Could someone point me to a website where I can type in two city paris and get the non-stop flight time?

I want to look at some NYC-Asia flight times, yet NYC is not heavily served by direct, non-stop flights to there. I just want to enter i.e. JFK - HKG and HKG - JFK and get whatever hours it is. I could look up individual airlines flights, but say you don't know the scheduled and such.... and don't feel like look it up.

Even better would be if I could enter two cities like JFK - Bangkok, even though there are no direct non-stop flights and still get the flight time.

I am sure you know what I am talking about. Any direction is appreciated. Thanks.